diff options
| author | David Lin <CTLIN0@nuvoton.com> | 2023-06-02 07:09:23 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2023-06-02 14:55:33 +0300 |
| commit | 6d64c33f0f0018bd26836680175b4ee05f3cf54c (patch) | |
| tree | ca5e2ca8ad12ff74f763fcbbd82b4029548210ef | |
| parent | b81a2cc9a2f2314dad78ca14f12d2fbf8e071c3e (diff) | |
| download | linux-6d64c33f0f0018bd26836680175b4ee05f3cf54c.tar.xz | |
ASoC: nau8825: Update the calculation of FLL for NAU8825C
The FLL is updated to 24 bit with lower power consumption.
Signed-off-by: David Lin <CTLIN0@nuvoton.com>
Link: https://lore.kernel.org/r/20230602040924.188913-3-CTLIN0@nuvoton.com
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | sound/soc/codecs/nau8825.c | 27 |
1 files changed, 22 insertions, 5 deletions
diff --git a/sound/soc/codecs/nau8825.c b/sound/soc/codecs/nau8825.c index 91eb05899a88..e62f3d615b40 100644 --- a/sound/soc/codecs/nau8825.c +++ b/sound/soc/codecs/nau8825.c @@ -53,6 +53,7 @@ struct nau8825_fll { int mclk_src; int ratio; int fll_frac; + int fll_frac_num; int fll_int; int clk_ref_div; }; @@ -2360,9 +2361,12 @@ static int nau8825_calc_fll_param(unsigned int fll_in, unsigned int fs, /* Calculate the FLL 10-bit integer input and the FLL 16-bit fractional * input based on FDCO, FREF and FLL ratio. */ - fvco = div_u64(fvco_max << 16, fref * fll_param->ratio); - fll_param->fll_int = (fvco >> 16) & 0x3FF; - fll_param->fll_frac = fvco & 0xFFFF; + fvco = div_u64(fvco_max << fll_param->fll_frac_num, fref * fll_param->ratio); + fll_param->fll_int = (fvco >> fll_param->fll_frac_num) & 0x3FF; + if (fll_param->fll_frac_num == 16) + fll_param->fll_frac = fvco & 0xFFFF; + else + fll_param->fll_frac = fvco & 0xFFFFFF; return 0; } @@ -2376,8 +2380,16 @@ static void nau8825_fll_apply(struct nau8825 *nau8825, regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL1, NAU8825_FLL_RATIO_MASK | NAU8825_ICTRL_LATCH_MASK, fll_param->ratio | (0x6 << NAU8825_ICTRL_LATCH_SFT)); - /* FLL 16-bit fractional input */ - regmap_write(nau8825->regmap, NAU8825_REG_FLL2, fll_param->fll_frac); + /* FLL 16/24 bit fractional input */ + if (fll_param->fll_frac_num == 16) + regmap_write(nau8825->regmap, NAU8825_REG_FLL2, + fll_param->fll_frac); + else { + regmap_write(nau8825->regmap, NAU8825_REG_FLL2_LOWER, + fll_param->fll_frac & 0xffff); + regmap_write(nau8825->regmap, NAU8825_REG_FLL2_UPPER, + (fll_param->fll_frac >> 16) & 0xff); + } /* FLL 10-bit integer input */ regmap_update_bits(nau8825->regmap, NAU8825_REG_FLL3, NAU8825_FLL_INTEGER_MASK, fll_param->fll_int); @@ -2419,6 +2431,11 @@ static int nau8825_set_pll(struct snd_soc_component *component, int pll_id, int struct nau8825_fll fll_param; int ret, fs; + if (nau8825->sw_id == NAU8825_SOFTWARE_ID_NAU8825) + fll_param.fll_frac_num = 16; + else + fll_param.fll_frac_num = 24; + fs = freq_out / 256; ret = nau8825_calc_fll_param(freq_in, fs, &fll_param); if (ret < 0) { |